class Book:

	def __init__(self, bookId, title="", author="", isbn="", category="", keyword="", available=True):
		""" default constructor for Book """
		self._bookId = bookId
		self._title = title
		self._author = author
		self._isbn = isbn
		self._category = category
		self._keyword = keyword
		self._available = available
		
	def setBookId(self, bookId):
		self._bookId = bookId
		
	def setTitle(self, title):
		self._title = title
		
	def setAuthor(self, author):
		self._author = author
		
	def setIsbn(self, isbn):
		self._isbn = isbn
		
	def setCategory(self, category):
		self._category = category
		
	def setKeyword(self, keyword):
		self._keyword = keyword
		
	def setAvailable(self, available):
		self._available = available
		
	def setReturnDate(self, returnDate):
		self._returnDate = returnDate
		
	def getBookId(self):
		return self._bookId
		
	def getTitle(self):
		return self._title
		
	def getAuthor(self):
		return self._author
		
	def getIsbn(self):
		return self._isbn
		
	def getCategory(self):
		return self._category
		
	def getKeyword(self):
		return self._keyword
		
	def isAvailable(self):
		return self._available
		
	def getReturnDate(self):
		return self._returnDate
		
		